Gretchen is watching her infant McKenzie sleep.Gretchen notes that McKenzie's eyes dart back and forth beneath her eyelids.This suggests that McKenzie is

Question

Quizplus · Accepted Answer

The description of McKenzie's eyes darting back and forth beneath her eyelids is a common indication of rapid eye movement (REM) sleep, which is the stage of sleep during which dreaming occurs. Therefore, option B is the best choice. Sleep spindles and delta waves occur during non-REM sleep stages, and Stage 4 sleep is a deep non-REM sleep characterized by delta waves.

Gretchen Is Watching Her Infant McKenzie Sleep